She's 62, she'd probably love to be "cut off".
(that one made me LOL, Jerry.)
At 62, her kids are grown up. They are probably your age. Talk to them, not her. She's their Mom and they are her babies, no matter how old they get. They are the problem and need to get the EFF out of your marriage. Period.
Now gentlemen... listen up... some free advice that works... pay attention to her monthly cycle, stay out of her way 1 week before and 1 week after. During the actual week, baby her like she's your SOHC4 and on the remaining 4th week, talk to her about stuff because that is the only time where her hormones aren't out of control. She'll be less likely to go off the handle, more likely to listen to your side of the story, more open to change, etc. You get the picture. (Schedule vacation time during that week too and you'll be happier to spend every moment with her for a solid week.) If you vary outside of this advice, you're just asking for a butt whoopin'.
Bucky, you are outside of the above guidelines, I'm sure, but there is still a monthly cycle, it's just harder to read. If you think about it, you will figure out what weeks are better than others generally and adjust.
Black cohosh for hot flashes for older women and St John's Wort for PMS for the younger ones are good, natural remedies that actually work.
I'm not making excuses for any woman who is just a general #$%*. I mean this to help for those who have a good woman normally and then out of the blue, you are in the dog house and don't know why. The above^^^^^ is why.
I hope this helps. There are 2 of us here and we follow that guideline to the letter. We can always tell where the pissed off mood is coming from, whether hormones or whatever and adjust our attitudes accordingly until it cools off around here. We are the happiest couple we know.